Automatic sliding door.



No. 773,128. PATENTED OCT. 25, 19051 P. DENTLER.

AUTOMATIC SLIDING DOOR.

APPLICATION FILED an e. 1904.

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Witnesses: I I 11 velgtor QMawW/fi;

.By 43 ZA/ Atty.

No. 773,128. I I PATENTED 0GT.2'5,1'904.

F. DENTLER. AUIO'MATIG'SLIDING 1100a.

APPLICATION FILE D MAY 6 1904.

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Wit esses: L l lgvegtorn 92M 22% H 4444 i 6% M v Atty.

UNITED STATES Patented October 25, 1904:.

PATENT @FFI E.

FRANK-DENTLER, OF VICKSBURG, MICHIGAN.

AUTOMATIC-SLIDING DOOR.

' SPECIFICATION forming part of Letters Patent No. 773,128, datedOctober 25, 1904.

Application filed May 6, 1904:. Serial No. 206,706. (No model.)

. T (LZZ whom it mag concern:

Be it known that I, FRANK DENTLER, a citizen of the United States,residing at the village of Vicksburg, county of Kalamazoo, State ofMichigan, have invented certain new and useful Improvements inAutomatically-Sliding Doors, of which the following is a specification.

This invention relates to improvements in automatically-closing doors.

The main object of this invention is to provide, in connection with adoor or doors adapted to close automatically when released, meanswhereby such door or doors may be released at a distance therefrom. 7

Further objects and objects relating to structural details willdefinitely appear from the detailed description to follow.

I accomplish the objects of myinvention by the devices and meansdescribed in the following specification. The invention is clearlydefined, and pointed out in the claims. f

l A structure embodying the features of my invention is clearlyillustrated in the accompanying drawings, forming a part of thisspecification, in which Figure 1 is a detail side elevation view of astructure embodying the features of my invention, taken on a linecorresponding to line 1 1 of Fig. 2. Fig. 2 is a detail transversesectional view taken on a line corresponding to line 2 2 of Fig. 1.-Fig. 3 is an enlarged detail plan view of the counterweight pulleyblockB, showing its support and retaining means. Fig. 4 is an enlarged detailside elevation view of the same.

In the drawings the sectional views are taken looking in the directionof the little arrows at the ends of the section-lines, and similarletters .of reference refer to similar parts throughout the severalviews.

Referring to the drawings, the doors A, two of which are illustrated inthe drawings, are mounted on the tracks A. These tracks are inclined, sothat when the doors are freed they automatically close. The doorstructure is preferably that illustrated and described in my applicationfor Letters Patent, filed March 26, 1904, Serial No. 200,196. The doorsare provided with counterweights a. Supportweights.

ing-cables a are provided for these counter- These cables are secured tothe rear of the doors, as at a. The-cables a are passed over the pulleysb on the blocks B, which are supported on the walls beyond the rear edgeof the doors when in their open position.

The pulley-blocks B are supported in the brackets B, which are providedwith suitable ways to receive the blocks. The pulleyblocks are retainedin the brackets by the pivoted levers (J, which engage the upwardly andrearwardly projecting catches Z) on the rear ends thereof. The outerends of these levers are provided with counterweights 0, so that whenreleased the lever swings free from the pulley-block catches, therebyreleasing the pulley-blocks, allowing them to drop from the supports.This releases the counter.-

weights so that the doors automatically close.

The pivoted levers C are provided with rollers on their inner ends whichare adapted to engage the hooks b on the pulley-blocks, so that when thelevers are released the pull of the door andv counterweight insures thedisengagement of the levers from the pulley-blocks. The levers C aresupported in their engaging positions by a cord or cable D, which isadapted to be severed by the fire or heat, so that in case of fire theretaining-levers are released and-the doors freed. This cord D is passedthrough suitable eyes 0 on the ends of the levers, so that it is free toslide therein. Supporting and guiding pulleys cl are provided for'theretaining-cords D, so that they are supported close to the ceiling,where they are not likely to be accidentally engaged. In case there areseveral compartments in the building the retaining cord or trip D ispassed through the walls, as at cl, and through each compartment, sothat a single cord serves to retain all the doors. When thus arranged,in case of fire in any compartment the releasing of the cord releasesall the doors.

In Fig. 2 I have illustrated my invention applied to two doors, fromwhich-it is evident that any number may be thus connected.

While I prefer to form the retaining-cord D of some combustible orfusible material, it is evident that it is of advantage if formed ofsome material so that it would be necessary to release it manually, as aseries of doors can thus be simultaneously released.

Vith the parts thus arranged the doors may be freely operated in theusual manner.

I have illustrated and described my improved fire-door structure indetail in the form preferred by me on account of its structuralsimplicity, although I am aware that it is capable of numerousmodifications in structural details without departing from my invention.

Having thus described my invention, what I claim as new, and desire tosecure by Letters Patent, is

1. The combination of a number of doors adapted to close automaticallywhen released; counterweights for said doors; supportingcables for saideounterweights; pulley-blocks for supporting said cables, havingupwardly and rearwardly inclined catches thereon; sup ports for saidpulley-blocks; ph otally-supported levers adapted to engage the catcheson said pulley-blocl s to retain them in said supports; and aretaining-cord slidably connected to said levers, all coacting for thepurpose specified.

2. The combination of a number of doors adapted to close automaticallywhen released; counterweights for said doors; supportingcables for saidcounterweights; pulley-blocks for supporting said cables, havingupwardlyand rearwardly inclined catches thereon; supports for saidpulley-blocks; pivotally-supported levers adapted to engage the catcheson said pulley-blocks to retain them in said supports; and aretaining-cord connected to said levers, all coacting for the purposespecified.

3. The combination of a number of doors adapted to close automaticallywhen released; counterweights for said doors; supportingcables for saidcounterweights; pulley-blocks for supporting said cables; supports forsaid pulley blocks; pivotally supported levers adapted to engage saidpulley'blocks to retain them in said supports; and a retaining-cordslidably connected to said levers, all coacting for the purposespecified.

4,. The combination of a number of doors adapted to close automaticallywhen released; counterweights for said doors; su pporting-cz bles forsaid counterweights; pulley-blocks for supporting said cables; supportsfor said pulley blocks; pivotally supported levers adapted to engagesaid pulley-blocks to retain them in said supports; and a retaining-cordconnected to said levers, all coacting for the purpose specified.

5. The combination of a number of doors adapted to close automaticallywhen released;

counterweights for said doors; supportingcables for said counterweights;pulley-blond for supporting said cables; supports for saidpulley-blocks; catch devices for retaining said pulley-blocks in saidsupports; and a retaining-cord slidably connected to said catch devices,all coacting for the purpose specified.

6. The combination of a door adapted to close automatically whenreleased; a counterweight for said door; a St]])] )(lll1lllg'-(ftl.|)lt\for said counterweight; a pulley-bloch t'or supporting said cable,having an upwardly and rearwardly inclined catch thereon; a support forsaid pulley-block; a pivotally-supported lever adapted to engage thecatch on said pulley-block to retain it in said support; and aretaining-cord connected to said lever, for the purpose specified.

7. The combination of a door adapted to close automatically whenreleased; a ,:ounterweight for said door; a supportii'ig-eal)le for saidcounterweight; a pulley-block l'or supporting said cable; a support forsaid pulleyblock; a pivotally-supportcd lever adapted to engage saidpulley-block to retain it in said support; and a retaining-cordconnected to said lever, for the purpose specified.

8. The combination of a door adapted to close automatically whenreleased; a (uninterweight therefor; a supporting-cable for saidcounterweight; a pulley-block for supporting said cable; a catch devicefor retaining said pulley-block; and a cord for trippiiig said catch,for the purpose specified.

9. The combination of a door adapted to close automatically whenreleased; a counterweight therefor; a supporting-cal)le for saidcounterweight; a pulley-block for supporting said cable; and areleasing-cord for said pulicy-block, for the purpose specilied.

10. The combination of a number of doors adapted to close automaticallywhen released, counterweights therefor; supporting-caldes for saidcounterweights, catch devices for supporting said cables, and a commonreleasingcord for said catch devices for the purpose specified.

11. The combination of a door adapted to close automatically whenreleased; a counterweight therefor; a supporting-cal le for saidcounterweight; a catch device for supporting said cable; and a cordadapted to release said catch device, for the purpose specified.

In witness whereof I have hereunto set my hand and seal in the presenceof two witnesses.

FRANK THIN'ILlGh. IL. s.|

\Vi tnesses:

Etrnnn A. Tntmur, O'rrs A. EARL.

